610186 divided by 18 
The aim is to understand the frequency of 18 in 610186.

Going ahead to step 1:
6 divided by 18 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 18

On to step 2:
18 goes into 61 3 times with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 54 from 61, we get 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 18

Moving on to step 3:
When dividing 70 by 18, we get 3 with a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Subtract 54 from 70 to get 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 18

Advancing to step 4:
If we divide 161 by 18, we get 8 and a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 338.0
If we take 144 away from 161, we end up with 17.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 18

Advancing to step 5:
18 can be fit into 178 9 times, resulting in a remainder of 16.
Use 9 as the next digit of our solution. 
Result so far: 3389.0
Subtract 162 from 178 to get 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 18

Advancing to step 6:
The number 18 fits into 166 9 times, leaving a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 33899.0
If we take 162 away from 166, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
The number 18 fits into 40 2 times, leaving a remainder of 4.
The next digit of our result is 2. 
Result so far: 33899.2
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
18 goes into 40 2 times with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 33899.22
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 33899.22 with a remainder of 0.004.